Results 81 to 90 of about 1,792 (166)

Mid-Proterozoic Ferruginous Conditions Reflect Postdepositional Processes [PDF]

, 2019
To evaluate the mechanics of mid‐Proterozoic environmental iron transport and deposition, we coupled microscale textural and bulk rock magnetic techniques to study the ~1.4‐Ga lower Belt group, Belt Supergroup, Montana and Idaho.
Fischer, Woodward W., Kirschvink, Joseph L., Slotznick, Sarah P., Webb, Samuel M.   +3 more
core   +1 more source

Combining 3‐D Deep Electrical Resistivity Tomography With Magnetic Surveys to Investigate Complex Tectonic Basins: A Case Study From the Central Apennines Seismic Belt (Italy)

Tectonics, Volume 44, Issue 9, September 2025.
Abstract We use an innovative geophysical approach to reconstruct the deep structure of Campo Felice, an important extensional basin in the central Apennines (Italy) where active crustal extension is accommodated by normal faults capable of generating earthquakes of magnitude MW 6+.
V. Sapia, F. Villani, L. Improta, F. Fischanger, P. M. De Martini, V. Romano, V. Materni, P. Baccheschi, A. Smedile, I. Nicolosi, L. Minelli, F. D’Ajello Caracciolo, R. Carluccio, S. Maraio, G. Di Giulio, L. Ruggiero, A. Sciarra, D. Pantosti, M. Pischiutta, T. Ricci, R. Civico, M. Vassallo, C. A. Brunori, M. Lupi   +23 more
wiley   +1 more source

A lock-in model for the complex Matuyama-Brunhes boundary record of the loess/palaeosol sequence at Lingtai (Central Chinese Loess Plateau) [PDF]

, 2017
In most marine sedimentary records, the Matuyama-Brunhes boundary (MBB) has been found in interglacial oxygen isotope stage 19. In the magnetostratigraphic records of most Chinese loess/palaeosol profiles the MBB is located in loess layer L8, which was ...
Dobeneck, T. von, Evans, M. E., Heller, F., Spassov, S., Yue, L. P.   +4 more
core  

Magnetic unmixing of first-order reversal curve diagrams using principal component analysis [PDF]

, 2015
We describe a quantitative magnetic unmixing method based on principal component analysis (PCA) of first-order reversal curve (FORC) diagrams. For PCA we resample FORC distributions on grids that capture diagnostic signatures of single-domain (SD ...
Abdi, Alexander M. Piotrowski, Carvallo, Channell, Chen, Church, David A. Hodell, De la Peña, Dunlop, Egli, Egli, Egli, Egli, Grande, Harrison, Harrison, Hatfield, Hatfield, Heslop, Heslop, Heslop, Heslop, Heslop, Heslop, Heslop, Hibbert, Hyvärinen, Ioan Lascu, James E. T. Channell, Joy R. Muraszko, Kruiver, Lascu, Li, Ludwig, Malinowski, Mellinger, Muxworthy, Muxworthy, Newell, Pike, Pike, Richard J. Harrison, Roberts, Roberts, Roberts, Robertson, Temple, Valder, Wold, Woocay, Yuting Li   +50 more
core   +2 more sources

Ferrimagnetic Structure of 3C Pyrrhotite (Fe7S8) From Neutron Diffraction

Geochemistry, Geophysics, Geosystems, Volume 26, Issue 9, September 2025.
Abstract Pyrrhotite is a paleomagnetically important magnetic mineral in many geological settings. It forms numerous polytypes with different stacking patterns of the NiAs structure along the crystallographic c axis to produce different vacancy‐ordered superstructures.
Chin‐Wei Wang, Chorng‐Shern Horng, Andrew P. Roberts   +2 more
wiley   +1 more source

Tracing Fluid‐Rock Interactions and Migration Pathways in Shallow Megathrust Shear Zones Through Rock Magnetic Analysis

Journal of Geophysical Research: Solid Earth, Volume 130, Issue 9, September 2025.
Abstract Megathrust shear zones are the main fluid transport pathways during the seismic cycle and play a key role in controlling physicochemical alteration. Defining fluid‐rock interaction in wall rocks provides evidence for unraveling the hydrogeology of shear zones and their link to active fluid circulation.
Claudio Robustelli Test, Dario Bilardello, Elena Zanella, Stefano Ghignone, Luca Pellegrino, Enzo Ferrara, Andrea Festa, Francesca Remitti   +7 more
wiley   +1 more source

Rock magnetic techniques complemented by ferromagnetic resonance spectroscopy to analyse a sediment record [PDF]

, 2017
Environmental magnetism uses the spatial and temporal occurrence of magnetic carriers as diagnostic tools to detect environmental changes. Concentration, composition, grain size and configuration of the carriers inferred from magnetic properties are key ...
García-Rubio, Inés, Gehring, Andreas U., Kind, Jessica, Raden, Ulrike J. van   +3 more
core  

First paleomagnetic results of mid-to late Holocene sediments from Lake Issyk-Kul (Kyrgyzstan): Implications for paleosecular variation in central Asia [PDF]

, 2012
We present new paleomagnetic and rock magnetic data from mid and late Holocene sediments recovered in two gravity cores (C087 and C142a) from Lake Issyk-Kul (central Asia), for which independent radiocarbon-based age models are available.
Giralt, Santiago, Gómez-Paccard, Miriam, Larrasoaña, Juan C., Roberts, Andrew P.   +3 more
core   +1 more source

Late Mesoproterozoic Rapid True Polar Wander Recorded in the Jingeryu Formation, North China Craton

Journal of Geophysical Research: Solid Earth, Volume 130, Issue 8, August 2025.
Abstract Disentangling short‐duration (≤10 Ma) true polar wander (TPW) events in the Precambrian presents a significant challenge, necessitating the acquisition of high‐resolution and ‐quality paleomagnetic data and well‐determined age relations. This study reports new paleomagnetic results from carbonate sequences of the Jingeryu Formation in the ...
Hanqing Zhao, Shihong Zhang, Jikai Ding, Qiang Ren, Jianping Qu, Kunkun Yang, Haiyan Li, Tianshui Yang, Huaichun Wu   +8 more
wiley   +1 more source

Rapid, Precise, and High-Sensitivity Acquisition of Paleomagnetic and Rock-Magnetic Data: Development of a Low-Noise Automatic Sample Changing System for Superconducting Rock Magnetometers [PDF]

, 2008
Among Earth sciences, paleomagnetism is particularly linked to the statistics of large sample sets as a matter of historical development and logistical necessity.
Baumgartner, Christopher T., Holt, John W., Kirschvink, Joseph L., Kopp, Robert E., Raub, Timothy D.   +4 more
core   +2 more sources